*{
    margin: 0;padding: 0;text-decoration: none;
}
body{
    padding: 20px;
}
#container{
    width: 600px;
    height: 400px;
    border: 3px solid #333;
    overflow: hidden;
    position: relative;
}
#list{
    width: 4200px;
    height: 400px;
    position:absolute;
    z-index: 1;
}
#list img{
    float: left;
    height: 400px;
    width: 600px;
}

#buttons{
    position: absolute;
    height: 10px;
    width: 100px;
    z-index: 2;
    bottom: 20px;
    left: 250px;
}
#buttons span{
    cursor: pointer;
    float: left;
    border: 1px solid #fff;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #333;
    margin-right: 5px;
}
#buttons .on{
    background: orangered;
}

.arrow{
    cursor: pointer;
    display: none;
    line-height: 39px;
    text-align: center;
    font-size: 36px;
    font-weight: bold;
    width: 40px;
    height: 40px;
    position: absolute;
    z-index:2;
    top: 180px;
    background-color: rgba(0,0,0,.3);
    color: #fff
}
.arrow:hover{
    background-color: rgba(0,0,0,.7);
}

#container:hover .arrow{
    display: block;
}

#prev{left: 20px}
#next{right: 20px}
#text{
    display: none;
    text-align: center;
    z-index:4;
    top: 300px;
}
#container:hover #text{
    display: block;
}